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Finding the Fourth Proportional to 715,613.72, 987,534.24 and 393,323.73

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Solution

The fourth proportional to 715,613.72, 987,534.24 and 393,323.73 is: 542,779.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,613.72 : 987,534.24 = 393,323.73 : x
  2. Step 2: Convert to fraction form
    715,613.72/987,534.24 = 393,323.73/x
  3. Step 3: Cross multiply
    715,613.72x = 987,534.24 × 393,323.73
  4. Step 4: Simplify right side
    715,613.72x = 388,420,650,779.52
  5. Step 5: Solve for x
    x = 388,420,650,779.52/715,613.72
  6. Step 6: Final answer
    x = 542,779.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.